George and Amal Clooney Join Twins Club! Jennifer Lopez, Chris Hemsworth and More Stars With Double the Joy

George and Amal Clooney have officially joined the celebrities-with-twins club!

The adorable duo, who tied the knot in September 2014, welcomed their first children, a boy, Alexander, and a girl, Ella, on Tuesday. "I don't know how you fully digest [having two], but I'm excited," the first-time father told ET back in March. "It will be fun."

The next A-lister set to give birth to twins is Beyoncé. Her and husband Jay Z announced via Instagram in February that Blue Ivy would soon be a big sister to not one, but two bundles of joy. "We have been blessed two times over," the "Formation" singer said at the time.

In honor of these summer births, ET's looking back at other celebrities who've welcomed twins!

The Fences star is the father of 26-year-old twins Olivia and Malcom with wife Pauletta, and while chatting with ET at the 2017 NAACP Image Awards in February, he gave the Clooneys advice on how to raise two newborns.

"Sleep now!" he joked. "Because you won't be sleeping then!"

"I'm not talking to George, I'm talking to his wife," he continued. "Sleep now! [George is] gonna need support, and not from an actor. It's going to be a real performance. He'll see, but it's beautiful. We have twins and they're grown now, but it's a miracle."

Julia Roberts

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The Money Monster star, who shares 12-year-old twins Phinnaeus and Hazel with Daniel Moder, also had some words of wisdom for George and Amal about raising twins during her guest appearance on The Ellen DeGeneres Show last month.

"You sort of get through it and figure it out," Roberts, who's also mom to 9-year-old son Henry, admitted. "And everybody does, and it's a trial and error and a whole lot of tears and it's amazing. I have three incredible kids and to think about when they were teeny tiny. It goes so fast."

The "Living for Love" singer announced in February that she adopted Estere and Stelle, 4-year-old twin sisters who had previously been living at the Home of Hope orphanage in Malawi. Since then, she hasn't been able to stop gushing over the girls on Instagram, constantly posting pics of the two dressed in stylish ensembles.

"They're great. They also approve of my outfit," Madonna, who was chic in a camouflage dress designed by Jeremy Scott, told ET on the red carpet at the Met Gala last month. "It's very important."

The How I Met Your Mother star and his husband, David Burtka, announced in August 2010 that they were expecting twins, Harper and Gideon, now six, via a surrogate mother.

"When Harper was one or two years old and barely talking, she would put on Disney princess outfits, which she still does, by the way," Harris told Glamour in August 2014. "Everyone would coo and take pictures."

"Gideon felt left out, so he put on a dress too," he continued. "We all cooed and aww-ed and there was no weirdness. Lately he's been wearing construction vests and hard hats, and he asks construction people if he can work with them."

Angelina Jolie

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There's nothing the Oscar-winning actress loves more than being a mother to her and ex Brad Pitt's 8-year-old twins, Vivienne and Knox. So much, in fact, that when ET asked what she would do if she weren't an actress, she revealed she'd be a stay-at-home mom.

"I think I'd just be home being a mom," the mother of six said in 2008. "I love my kids. I just love being a mom."

A post shared by SJP (@sarahjessicaparker) on Jun 22, 2016 at 5:29am PDT

Like mother, like daughter(s)! The Sex and the City star and husband Matthew Broderick are parents to 7-year-old twin girls, Loretta and Tabitha, and it appears they're already following in their mother's fashion-forward footsteps.

"The first time Loretta put on a pair of my shoes I was like, 'Wow, I can't believe this is really happening,'" Parker gushed to ET in February 2014. "But then you're seeing them shuffle around. It was kind of tender, it was kind of sweet."

The Puerto Rican singer is father to 8-year-old twin boys Matteo and Valentino, born via a surrogate.

"Everything changes when you become a father," Martin told ET in March. "I'm a different person. Every decision I make is based on their well-being, and yes, they travel with me everywhere. We have a tutor, we home school them -- or we tour school, it's not home schooling anymore -- but I need them with me always."

"A lot of people tell me, 'But Rick, your kids need stability,' and I'm like, 'I am their stability. If I'm not around, they won't feel stable' and that's how it goes," he added. "In fact, whenever we spend too much time in one city, they go, 'Dad, what's next? Let's go. We're ready.'"

The Guardians of the Galaxy Vol. 2 star shares 2-year-old sons Bowie and Cy with husband Marco Perego, and while chatting with ET in April, the actress revealed starring in action movies prepared her to be "outnumbered" by the boys.

"I'm used to it. I've done all these action movies that I'm usually outnumbered [in], you know?" she quipped. "Once they grow up and they become dudes, I'm gonna rub it in their face. I'm gonna be so girly, they're gonna be annoyed by their mom every single day."

The Thor star and his wife, Elsa Pataky, are parents to 3-year-old twin boys Tristan and Sasha.

"It's no longer all about me, which is quite refreshing," he told Modern Luxury last March. "Acting is the most self-absorbed world, where you are thinking about your feelings... You are constantly having to self-analyze or analyze a character you are playing, so you are internalizing and thinking, thinking, thinking about me... It's just a horrible, noisy conversation. Once the kids arrived, I was like, 'Wow, this is what life is about.'"

Bowen and her husband, Scott Phillips, are proud parents to 8-year-old twin sons Gustav and John, but before they were born, the Modern Family star admitted she was "terrified" to tackle the task of raising two newborns at once.

"I did not want twins as a second go-around. I should have been much more cautious. I should have had … half sex?" she joked to More magazine in 2011. "Children are like crazy, drunken small people in your house."

The actor and his husband, Simon Halls, are parents to 9-year-old twins Henry and Walker, and admitted in June 2015 that although they're still young, they're well aware one of their dads is famous.

"When I'm driving them to school in the morning -- the first couple of times I tried to duck my head -- they realize it's me," Bomer told PrideSource, about the twins seeing his body on billboards for Magic Mike XXL. "So, I told them when I was doing the movie, 'This is a movie I'm doing where we play dancers and we have fun and we try to entertain these ladies.'"

Though they're now reportedly in protective custody (more on that HERE), Presley shares 8-year-old daughters Harper and Finley with her estranged husband, Michael Lockwood.

"This is very personal, and we're still going through a lot of different scenarios," her mother, Priscilla, told ET of the legal battle in March. "There's been a lot of rumors, a lot of speculation, and a lot of everything which always goes along with these situations. Nothing is sorted out yet. Everything is trying to be sorted out, and done with dignity and done with care, especially for the children."

Dennis Quaid

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Two weeks after the American Crime Story star and his wife, Kimberly, welcomed their now 9-year-old twins, Zoe and Thomas, via gestational carrier in November 2007, they were afraid they were going to lose them after they were accidentally given an overdose of the blood thinner Heparin.

"It turned their blood to the consistency of water," he explained during Theo Von and Matthew Cole Weiss' podcast, Allegedly, in December 2015. "The danger would be rupturing an artery. And they were so small they couldn't thrash around. I think that's what saved them."

"They're perfectly normal as could be now," he continued. "They're like head of their class. [But] you go to a dark place … you gotta pull yourself away from that, you gotta remain optimistic. Everything turned out OK. We had a happy ending."